September weather forecast
Santiago Lachiguiri, Mexico

The first month of the autumn, September, is still a hot month in Santiago Lachiguiri, Mexico, with temperature in the range of an average high of 32°C (89.6°F) and an average low of 22.7°C (72.9°F).

Temperature

In September, Santiago Lachiguiri's weather conditions record an average high-temperature of a still tropical 32°C (89.6°F), demonstrating little divergence from the preceding month. The average temperature in Santiago Lachiguiri during September nights dips to an agreeable 22.7°C (72.9°F).

Heat index

For most parts of September, the heat index is calculated to be a blisteringly hot 42°C (107.6°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The most humid month in Santiago Lachiguiri is September, with an average relative humidity of 75%.

Rainfall

In Santiago Lachiguiri, in September, during 18.3 rainfall days, 69mm (2.72") of precipitation is typically accumulated. In Santiago Lachiguiri, during the entire year, the rain falls for 110.2 days and collects up to 345mm (13.58") of precipitation.

Daylight

The average length of the day in September in Santiago Lachiguiri is 12h and 13min.
On the first day of the month, sunrise is at 6:08 am and sunset at 6:35 pm. On the last day of September, sunrise is at 6:12 am and sunset at 6:11 pm CST.

Sunshine

The average sunshine in September in Santiago Lachiguiri is 8.8h.

UV index

The months with the highest UV index are February through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.